feat: Implement market functionality with ProductCard, useMarket composable, and market store

- Add ProductCard.vue component for displaying product details, including image, name, description, price, and stock status.
- Create useMarket.ts composable to manage market loading, data fetching, and real-time updates from Nostr.
- Introduce market.ts store to handle market, stall, product, and order states, along with filtering and sorting capabilities.
- Develop Market.vue page to present market content, including loading states, error handling, and product grid.
- Update router to include a new market route for user navigation.

src/lib/config/index.ts

@@ -16,10 +16,18 @@ interface PushConfig {
   enabled: boolean
 }
 
+interface MarketConfig {
+  defaultNaddr: string
+  supportedRelays: string[]
+  lightningEnabled: boolean
+  defaultCurrency: string
+}
+
 interface AppConfig {
   nostr: NostrConfig
   api: ApiConfig
   push: PushConfig
+  market: MarketConfig
   support: {
     npub: string
   }
@@ -51,6 +59,18 @@ export const config: AppConfig = {
     vapidPublicKey: import.meta.env.VITE_VAPID_PUBLIC_KEY || '',
     enabled: Boolean(import.meta.env.VITE_PUSH_NOTIFICATIONS_ENABLED)
   },
+  market: {
+    defaultNaddr: import.meta.env.VITE_MARKET_NADDR || '',
+    supportedRelays: parseJsonEnv(import.meta.env.VITE_MARKET_RELAYS, [
+      'wss://relay.damus.io',
+      'wss://relay.snort.social',
+      'wss://nostr-pub.wellorder.net',
+      'wss://nostr.zebedee.cloud',
+      'wss://nostr.walletofsatoshi.com'
+    ]),
+    lightningEnabled: Boolean(import.meta.env.VITE_LIGHTNING_ENABLED),
+    defaultCurrency: import.meta.env.VITE_MARKET_DEFAULT_CURRENCY || 'sat'
+  },
   support: {
     npub: import.meta.env.VITE_SUPPORT_NPUB || ''
   }
@@ -74,10 +94,18 @@ export const configUtils = {
     return Boolean(config.push.vapidPublicKey && config.push.enabled)
   },
   
+  hasMarketConfig: (): boolean => {
+    return Boolean(config.market.defaultNaddr)
+  },
+  
   getDefaultRelays: (): string[] => {
     return config.nostr.relays
+  },
+  
+  getMarketRelays: (): string[] => {
+    return config.market.supportedRelays
   }
 }
 
 // Export individual config sections for convenience
-export const { nostr: nostrConfig, api: apiConfig } = config
+export const { nostr: nostrConfig, api: apiConfig, market: marketConfig } = config